The Daniel Defense DD4 RIII Upper Receiver Group (brand part number 23-191-02397-006) is an 11.5-inch upper built on Daniel Defense’s DD4 platform, finished in black. It ships with no sights, giving the buyer a clean slate to run their own optic and backup irons. This is an upper receiver group only, with no lower receiver included, so it is not itself a regulated firearm.

Key Specifications

• Chambered in .223 Rem/5.56 NATO, the standard AR-15 caliber with wide ammunition availability.
• Barrel length measures 11.5 inches, a common short-barrel configuration for a compact AR pistol or SBR.
• Rate of twist is 1-in-7, matched to a wide range of .223/5.56 bullet weights.
• Sights are not included, leaving the top rail clear for the buyer’s own optic and backup irons.
• Configuration is Daniel Defense’s Accessory-Uppers product line, built as a complete drop-in upper group.
• Finish is black, a durable, classic finish for a hard-use upper.

Frequently Asked Questions

Is this bare upper itself an NFA-regulated item? No. It is an upper receiver group with no lower receiver included, so it is not a regulated firearm on its own. Putting it on a shouldered rifle lower makes a short-barreled rifle; since October 9, 2026, ATF no longer requires Form 1 approval or registration for that, but state law still applies, and taking an SBR across state lines needs an approved ATF Form 5320.20.

Is this a complete rifle? No, this is an upper receiver group only with no lower receiver included. It ships without an FFL transfer and needs a compatible AR-15 lower to complete a rifle.

What does URG mean? URG stands for Upper Receiver Group, meaning the barrel, bolt carrier group, and handguard ship assembled as one unit ready to mate to a compatible lower.

Buy the Daniel Defense DD4 RIII URG, 11.5in, Black

This upper will ship as soon as it’s available from a Lubbock, Texas gun shop for your next compact AR build. Browse more complete uppers in our AR15 uppers selection.